Rowboat-propeller.



A. DRESHEFL ROWBOAT PROPELLER.

APPLICATION FILED APR. 11. 1912.

Patented Nov. 13, 1917.

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y. A QM? INVENTOR WITNESSES ANDREW nnnsnnn, or WAPAKONETA, oi-rro.

ROWBOAT-PROPELLER.

Specification of Letters Patent.

Patented Nov. 13, 1917.

Application filed April 11, 1917. Serial No. 161,238.

To all whom it may concern:

Be it known that I, ANDREW Dnnsnnn, a citizen of the United States,residing at Wapakoneta, in the county of Auglaize and State of Ohio,have invented new and useful Improvements in Rowboat-Propellers, ofwhich the following is a specification.

T his invention is an improved propeller and propeller operatingmechanism for use especially on a row-boat instead of oars, and adaptedto be operated manually, the object of the invention being to provide anim proved row-boat propeller and propeller operating mechanism which maybe readily attached to any ordinary row-boat, may be adjusted at anyrequired angle, according to the depth of the boat and which may be usedin steering as well as for propelling the boat.

The invention consists in the construction, combination and arrangementof devices hereinafter described and claimed.

In the accompanying drawings Figure 1 is a side elevation of apropelling mechanism constructed and'arranged in accordance with myinvention, and showing the same applied to a row-boat.

Fig. 2 is a plan of the boat showing two of the propelling mechanisms,one on either side of the boat.

Fig. 3 is a detailed vertical sectional view of my improved propellingmechanism, on a larger scale.

Fig. 4 is a detailed view of the propeller.

Fig. 5 is a detail perspective view of the supporting bracket.

In the embodiment of my invention I provide a bracket 1 which is adaptedto be arranged on one side of a row-boat and which is provided on itsinner side with a clamping arm 2 to pass over the gunwale downwardly onthe inner side of the gunwale the said clamping arms being provided witha pair of thumb screws 3 for engaging the gunwale and which coact withthe clamping arm to firmly and yet detachably secure the bracket to oneside of the boat.

I provide a casing 4 which has a tubular arm 5. A propeller shaft 6extends through the tubular arm and is mounted in suitable bearings 7 Atthe inner end of the propeller shaft and within the body of the casingis a miter-gear 8. Said gear is engaged by a similar gear as on a shaft10. Said shaft is mounted in a bearing 11 with which the casing isprovided. The said shaft extends inboard and is provided at its innerend with a hand crank 12 which has a handle 13. .The handle may begrasped to enable the crank shaft to be manually rotated and hence causethe propeller shaft and propeller 14- at the lower or outer end of saidshaft to be revolved, as will be understood.

The casing is connected to the bracket by a pivot element 15 whichadapts the casing and propeller shaft to be arranged at any desiredinclination, and to extend rearwardly of the boat. The bracket also hasa segment 16 at a suitable distance below the pivot 15, the tubular armof the casing having a member 17 which slidably bears against the outerface of the segment and is also provided with a clamping device, such asa thumb screw 18 to engage the segment and thereby secure the propellingmechanism at the desired or required angle or inclination, according tothe depth of the boat on which the propelling mechanism is used.

In practice a pair of my improved propelling mechanisms will be used onthe boat, one on each side thereof, and respectively arranged to bedriven by the right and left hands of the user, who may sit facing thebow. WVhen the propelling mechanisms are both driven at a same rate ofspeed the boat will move straight ahead. By operating one propellingmechanism faster than the other the course can be changed. By operatingthe propelling mechanisms reversely the boat can be turned within veryshort space.

A suitable grease cup 23 is at the lower end of each tubular arm of thecasing.

While I have herein shown and described a preferred form of my inventionI would have it understood that changes may be made in the form,proportion and construction of the several parts, without departing fromthe spirit of my invention and within the scope of the appended claim.

Having thus described my invention, what I claim is A hand propellingmechanism of the class described comprising a casing having a tubulararm, a propeller shaft mounted in and extending through the tubular armand provided at the inner end, at a point within the casing, with agear, a driving shaft mounted in thecasing and havin a gear 5 engagingthat of the propeller sha t, and a' bracket'for attachment to one sideof a boat and to which bracket the said tuhulararm is pivotallyconnected for vertical angular movement, said bracket having a segmentand means to secure the tubular arm to the 1' segment at any angularadjustment of said tubular arm and casing.

In testimony whereof I afiix my signature.

ANDREW'DRESHER.

can of this p atent may be obtained for five cents each, by addressingthe Commissioner of Patents,

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